[英]Retrieve data from a dialog in the calling window
I am struggling to retrieve results from a QDialog window and pass them back to the previous window.我正在努力从 QDialog 窗口中检索结果并将它们传递回前一个窗口。 I want the user to be able to select a value/values, and then once they click okay in the dialog window, it should return them back to the previous window, and pass the text into the byVariables Textbox.
我希望用户能够选择一个值/值,然后一旦他们在对话框窗口中单击确定,它应该将它们返回到前一个窗口,并将文本传递到 byVariables 文本框。 The error returns on the line
self.procUnivariate.byVariables.setText(item.text())
.错误返回
self.procUnivariate.byVariables.setText(item.text())
行。 The error states:错误指出:
AttributeError: 'ProcUnivariateVariables' object has no attribute 'procUnivariate'
AttributeError:“ProcUnivariateVariables”对象没有属性“procUnivariate”
I also tried using a return statement as you can see that is commented out.我还尝试使用 return 语句,你可以看到它被注释掉了。 Unfortunately it seemed like the code got stuck and wasn't moving to the next line as I threw a print statement after and it never printed that line.
不幸的是,代码似乎卡住了,没有移动到下一行,因为我在之后抛出了一个打印语句,但它从未打印过该行。 I need help figuring out how to pass it back to the ProcUnivariate class once the okay button is clicked.
单击确定按钮后,我需要帮助确定如何将其传递回 ProcUnivariate 类。 Also, if I can figure this out, I'll likely turn the ProcUnivariate Class into a dialog window as well because it should take away the focus from the main window and shouldn't stay open if the main window is closed.
此外,如果我能弄清楚这一点,我可能会将 ProcUnivariate 类也变成一个对话框窗口,因为它应该从主窗口中移开焦点,并且在主窗口关闭时不应该保持打开状态。
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QPushButton, QListWidget, QLineEdit, QTextEdit, QGridLayout, QHBoxLayout, QVBoxLayout, QDialog, QSizePolicy, QFileDialog, QTabWidget, QCheckBox
import PyQt5.QtGui as qtg
import glob
import os
from PyQt5.QtCore import Qt, QSettings
import inspect
from PyQt5 import QtCore
import pandas as pd
import pathlib
import pyreadstat
import json
class ProcUnivariateVariables(QDialog):
def __init__(self):
super().__init__()
self.procUnivariateByVariables = []
self.layout = QGridLayout()
self.setLayout(self.layout)
self.allVariables = QListWidget()
self.allVariables.setSelectionMode(3)
self.variablesSelected = QListWidget()
self.variablesSelected.setSelectionMode(3)
self.layout.addWidget(self.allVariables, 1,0, 4, 1)
self.layout.addWidget(self.variablesSelected, 1, 1, 4, 1)
self.okButton = QPushButton("Ok")
self.resetButton = QPushButton("Reset")
self.cancelButton = QPushButton("Cancel")
self.layout.addWidget(self.okButton, 1, 2)
self.layout.addWidget(self.resetButton, 2, 2)
self.layout.addWidget(self.cancelButton, 3, 2)
self.addByVariable = QPushButton(">")
self.removeVariable = QPushButton("<")
self.layout.addWidget(self.addByVariable, 5, 0)
self.layout.addWidget(self.removeVariable, 5, 1)
self.button_Connections()
def setItems(self, items):
self.allVariables.clear()
for item in items:
self.allVariables.addItem(item)
def add_by_variable(self):
selected_elements=[item.text() for item in self.allVariables.selectedItems()]
variableItem = self.variablesSelected.insertItems(self.variablesSelected.count(),selected_elements)
def button_Connections(self):
self.addByVariable.clicked.connect(self.add_by_variable)
self.removeVariable.clicked.connect(self.remove_variable)
self.okButton.clicked.connect(self.okay_clicked)
def remove_variable(self):
removeVariables = [item.text() for item in self.variablesSelected.selectedItems()]
self.selectedVariables.takeItems(removeVariables)
#sourceItem = self.currentSource.takeItem(oldSource)
def okay_clicked(self):
self.byVariablesSelected = [item.text() for item in self.variablesSelected.selectedItems()]
#self.procUnivariateByVariables = byVariablesSelected
print(self.byVariablesSelected)
self.accept()
#return self.byVariablesSelected
for item in self.byVariablesSelected:
print(item)
self.procUnivariate.byVariables.setText(item.text())
class ProcUnivariate(QWidget):
def __init__(self):
super().__init__()
self.procUnivariateVariables = None
layout = QGridLayout(self)
##Proc Univariate window Widgets
self.by = QLabel("By")
self.byVariables = QLineEdit()
self.byVariableList = QListWidget()
self.byButton = QPushButton("...")
self.varLabel = QLabel("Var")
self.classLabel = QLabel("Class")
self.freqLabel = QLabel("Freq")
self.histogramLabel = QLabel("Histogram")
self.freqBox = QLineEdit()
self.histBox = QLineEdit()
self.varBox = QLineEdit()
self.varButton = QPushButton("...")
self.sourceLabel = QLabel("Name")
self.sourceText = QLineEdit()
self.sourceButton = QPushButton("...")
self.selectionLabel = QLabel("Selection criteria")
self.selectionCriteria = QTextEdit()
self.statisticLabel = QLabel("Output")
self.statisticSearch = QLineEdit()
self.statisticList = QListWidget()
self.statisticList.setSortingEnabled(True)
self.outputLabel = QLabel("Output Statement")
self.outputText = QTextEdit()
self.fileOutputPath = QLineEdit("Output File Path")
self.runButton = QPushButton("Run")
self.previewButton = QPushButton("Preview")
self.okButton = QPushButton("Ok")
self.resetButton = QPushButton("Reset")
self.cancelButton = QPushButton("Cancel")
self.secondWindowConnections()
layout.addWidget(self.by, 1,0,1,1)
layout.addWidget(self.byVariables, 2, 0, 1, 4)
layout.addWidget(self.byButton, 2, 5, 1, 1)
#layout.addWidget(self.byVariableList, 3, 0, 1, 1)
layout.addWidget(self.freqLabel, 3, 0)
layout.addWidget(self.freqBox, 4, 0, 1, 4)
layout.addWidget(self.histogramLabel, 5, 0)
layout.addWidget(self.histBox, 6, 0, 1, 4)
layout.addWidget(self.varLabel, 7, 0, 1, 4)
layout.addWidget(self.varBox, 8, 0)
layout.addWidget(self.varButton, 8,5)
layout.addWidget(self.sourceLabel, 1, 6)
layout.addWidget(self.sourceText, 2, 6, 1, 4)
layout.addWidget(self.sourceButton, 2, 10)
layout.addWidget(self.selectionLabel, 3, 6)
layout.addWidget(self.selectionCriteria, 4, 6, 1, 4)
layout.addWidget(self.statisticLabel, 5, 6)
layout.addWidget(self.statisticSearch, 6, 6, 1, 4)
layout.addWidget(self.statisticList, 7, 6, 3, 4)
layout.addWidget(self.outputLabel, 10, 6)
layout.addWidget(self.outputText, 11, 6, 1, 4)
layout.addWidget(self.runButton, 12, 6)
layout.addWidget(self.previewButton, 12, 7)
layout.addWidget(self.okButton, 12, 8)
layout.addWidget(self.resetButton, 12, 9)
layout.addWidget(self.cancelButton, 12, 10)
self.setLayout(layout)
def secondWindowConnections(self): # this had a typo
self.byButton.clicked.connect(self.show_third_window)
def show_third_window(self):
if self.procUnivariateVariables is None: # if window has been created yet
self.procUnivariateVariables = ProcUnivariateVariables() # create window
if not self.procUnivariateVariables.isVisible(): # if window is showing
self.procUnivariateVariables.show() # show window
self.procUnivariateVariables.setItems(self.procUnivariateVariablesItems) # send items to window
def send_items(self, items): # this is to collect the variable that
self.procUnivariateVariablesItems = items # move to the third window
class MainWindow(QWidget):
def __init__(self):
super().__init__()
# Add a title
self.setWindowTitle("GUI Querying Program")
self.layout = QHBoxLayout()
self.setLayout(self.layout)
self.initUI()
self.setButtonConnections()
self.sw = None # dont initialize until neccessary.
def initUI(self):
subLayouts = {}
subLayouts['LeftColumn'] = QGridLayout()
self.layout.addLayout(subLayouts['LeftColumn'],1)
self.buttons = {}
self.buttons['addVariable'] = QPushButton('>')
self.buttons['removeVariable'] = QPushButton('<')
self.buttons['Toolkit'] = QPushButton('Toolkit')
self.variables = QListWidget()
self.selectedVariables = QListWidget()
subLayouts['LeftColumn'].addWidget(self.variables, 7,0,4,1)
subLayouts['LeftColumn'].addWidget(self.selectedVariables, 7,1,4,1)
subLayouts['LeftColumn'].addWidget(self.buttons['addVariable'], 10,0,1,1)
subLayouts['LeftColumn'].addWidget(self.buttons['removeVariable'], 10,1,1,1)
subLayouts['LeftColumn'].addWidget(self.buttons['Toolkit'], 11,1,1,1)
names = ['apple', 'banana', 'Cherry']
self.variables.insertItems(0, names)
def setButtonConnections(self):
self.buttons['addVariable'].clicked.connect(self.add_variable)
self.buttons['Toolkit'].clicked.connect(self.show_new_window)
# self.buttons['Toolkit'].clicked.connect(self.add_selected_variables)
# only use one connnect slot
def add_variable(self):
for item in self.variables.selectedItems():
self.selectedVariables.addItem(item.clone())
def show_new_window(self):
if self.sw is None: # check if window has been constructed
self.sw = ProcUnivariate() # construct window
if not self.sw.isVisible(): # If winow is not showing
self.sw.show() # show window
self.sw.send_items(self.add_selected_variables()) # send selected
# variables to second window
def add_selected_variables(self):
items = []
for i in range(self.selectedVariables.count()):
items.append(self.selectedVariables.item(i).clone())
# self.tw.setItems(items) ... self.tw doesnt exist so return them
return items
if __name__ == "__main__":
import sys
app = QApplication([])
mw = MainWindow()
mw.show()
app.exec()
What you need to do is connect a slot to the accepted
signal of the dialog, and then retrieve the variables via a dedicated method of the dialog when that signal is emitted.您需要做的是将插槽连接到对话框的
accepted
信号,然后在发出该信号时通过对话框的专用方法检索变量。
Here are all the relevant changes (fully tested as working):以下是所有相关更改(完全测试为有效):
class ProcUnivariateVariables(QDialog):
...
def button_Connections(self):
...
# connect to the dialog's built-in accept slot
self.okButton.clicked.connect(self.accept)
# add a method for retrieving the variables
def byVariablesSelected(self):
return [item.text() for item in self.variablesSelected.selectedItems()]
class ProcUnivariate(QWidget):
...
def secondWindowConnections(self): # this had a typo
self.byButton.clicked.connect(self.show_third_window)
self.varButton.clicked.connect(self.show_third_window)
def show_third_window(self):
if self.procUnivariateVariables is None: # if window has been created yet
self.procUnivariateVariables = ProcUnivariateVariables() # create window
# connect the new slot to the dialog's built-in accepted signal
self.procUnivariateVariables.accepted.connect(self.receive_selected_variables)
if not self.procUnivariateVariables.isVisible(): # if window is showing
self.procUnivariateVariables.show() # show window
self.procUnivariateVariables.setItems(self.procUnivariateVariablesItems) # send items to window
# set an identifier from the source button
self.procUnivariateVariables.sourceName = self.sender().text()
# add a slot for handling the dialog's accepted signal
def receive_selected_variables(self):
variables = self.procUnivariateVariables.byVariablesSelected()
text = ', '.join(variables)
if self.procUnivariateVariables.sourceName == 'byButton':
self.byVariables.setText(text)
else:
self.varBox.setText(text)
(Note that the above changes make the okay_clicked
method of ProcUnivariateVariables
redundant, so it should be removed). (注意上面的改动使得 ProcUnivariateVariables 的
okay_clicked
方法ProcUnivariateVariables
多余,所以应该去掉)。
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